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USN-518-1: linux-source-2.6.15, linux-source-2.6.17, linux-source-2.6.20 vulnerabilities

25 September 2007

linux-source-2.6.15, linux-source-2.6.17, linux-source-2.6.20 vulnerabilities

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Releases

Packages

Details

Evan Teran discovered that the Linux kernel ptrace routines did not
correctly handle certain requests robustly. Local attackers could exploit
this to crash the system, causing a denial of service. (CVE-2007-3731)

It was discovered that hugetlb kernels on PowerPC systems did not prevent
the stack from colliding with reserved kernel memory. Local attackers
could exploit this and crash the system, causing a denial of service.
(CVE-2007-3739)

It was discovered that certain CIFS filesystem actions did not honor
the umask of a process. Local attackers could exploit this to gain
additional privileges. (CVE-2007-3740)

Wojciech Purczynski discovered that the Linux kernel ia32 syscall
emulation in x86_64 kernels did not correctly clear the high bits of
registers. Local attackers could exploit this to gain root privileges.
(CVE-2007-4573)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 7.04
Ubuntu 6.10
Ubuntu 6.06

After a standard system upgrade you need to reboot your computer to
effect the necessary changes.

References

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Further reading